Apparatus for manufacturing metal sheets and strips



Dec..30, 1924. 1,521,065

F. BARME ET AL APPARATUS FOR MANUFACTURING METAL SHEETS AND STRIPS Filed Dec. 22, 1925 Fatented Dec. SO, 1924.

UNITED STATES P'A'raur oFFIcl-L FRIEDRICH BABJIE, OF ELBERFELD, AND FRITZ MAHNERT, OE NIERENHOF, NEAR LANGENBERG, GERMANY. v

APPARATUS FOR MANUFACTURING METAL SHEETS AND STRIPS.

7 Application med December 22, 192a Serial No. 682,264.

To all whom it may concern:

Be it known that we, FRIEDRICH BARM'n and FRITZ MAHNERT, residing at Elberfeld and Nierenhof, near Langenberg, both in Germany, respectively, have invented certain new anduseful Improvements in an Apparatus for Manufacturing Metal Sheets and Strips, of which the following is'a specification.

This invention relates to a process for the production of metal sheets and bands by means of presses. The conversion of a hollow metal block into a tubular. strip by a press and then by cutting and flatteninginto a band is-known. This known process is, however, not suitable for, and is not intended for, the purpose: of producing sheets or broad bands.

. an annular slot, which is formed in acom- According to this invention a metal block which is enclosed in a known way in a hollow cylindrical container, is pressed through bined. tool in front of the block container, and in any known way, a metal separating member (for instance a knife) is arranged in alignment with the direction of the press action so that the tubular strips formed by the slot are split and flattened. The formation of the annular slot through which the metal is pressed, in atool positionedin front of the block container enables the outer diameter of the ring slot to be' made as large or nearly as large as the outer block diameter. Further the whole content of the block container is used in the treatment of the block, which can therefore be solid. Accordingly the diameter of the pressed tubular strip and the metal mass for disposal in the block container are sufficiently large to enable broad strips that is sheets to be endlessly produced. If the outer diameter of the annular slot is somewhat smaller than the outer block diameter a further ad' vantage is obtained in that by pressing the block through the annular slot the dirty outer film of the block (oxide film) is scraped off, so that the resulting band or sheet has' clear surfaces without further treatment.

apparatus, and I Fig. 2 shows a longitudinal section of part In the drawings, a is a container plovided inside with a casing for receiving the metal block (not shown) which is preferably solid. 0 is a ring shaped matrix secured at the mouth ofthecontainer a and Z is aninner, part projecting into this matrix, which together with the matrix 0 makes up the combined tool forming the annular slot. The inner press part Z forms, in the constructional example shown, the free end of a punch 03, which is provided with a knife m toseparate the metal pressed through the ring slot. This knife m or any suitable separating member, can however be situated in the annular slot itself or at any other desired place in alignment with the direction of the press action.

p is a plunger secured to the piston t of a hydraulic press cylinder 1-. This plunger presses-the block held in the container a through the annular slot between the matrix and they inner part 1, so that with the assistance of the separating member m the blockis formed into atubular metalstrip. This in known manner is guided by a member e preferably trough shaped, so that the metal proceeds in the form of a sheet or abroad band. 1

The actual form and construction of the remaining parts of the press are not essential to the invention.

In order that the general construction of the constructional parts illustrated may be properly understood, the following further description is given.

The block container (1 is adjustably at-v tached to a cross beam 6, which is connected by rods with the hydraulic press cylinder-r. The unch d is guided through the troughforwards by a hydraulic piston 7 moving in a cylinder 9. In the construction shown the punch d is prevented from moving back-X wards by a wedge-k. The pressure exercised on the unch is taken by a crossmember k' which lsheld to the cross beam 6 bytwo rods y A" 1, block is placed in the .container :1, the pressplunger p moved-forward and the block in the manner described above .is

mem er e and can be moved backwards and pressed .throu hthe annular slot between 0 v and Z. By thls means the outer oxide film of the block is removed by the matr x 0.

When the pressing is finished the metal block is converted almost without any waste remaining into the form of a tubular strip and this is converted into a sheet orband whilst edge onthefinished comprising a block container, press matrlx secured by loosening the wedge is by the aid of the rod n the punch 13 and-the inner part Z can be moved intosuch a osition that the sheet tainer which forms with the matrix the annular slot, Ia separating member tosplit the tubular strip for separating the block in alignment wi h the direction of the press action to form a tube and a member which W flattens the tubular strip.

2, In an apparatuses claimed in claim 1 3 Mamas and after completion 1 in which the diameter of the press matrix and therefore the outer diameter ofthe annular slot is somewhat smaller than the outer diameter of the metal block.

3. In an apparatus for the manufacture of metal sheets or strips by forcing a metal block through an annularspace and spreading out the formed tubular strip, the combination"'wherein amatrix is fixed to the mouth of the block receiving cylinder and a mandrel arranged in front of the receiving cylinder Witnesses:

ELLY KEIMKEIT, MARTHA GESTER.

forming an annular space between the mandrel andthe said matrix and means. 

